Global Patent Index - EP 2144230 A1

EP 2144230 A1 20100113 - Low bitrate audio encoding/decoding scheme having cascaded switches

Title (en)

Low bitrate audio encoding/decoding scheme having cascaded switches

Title (de)

Audiokodierungs-/Audiodekodierungsschema geringer Bitrate mit kaskadierten Schaltvorrichtungen

Title (fr)

Schéma de codage/décodage audio à taux bas de bits disposant des commutateurs en cascade

Publication

EP 2144230 A1 20100113 (EN)

Application

EP 09002271 A 20090218

Priority

  • US 7985408 P 20080711
  • EP 08017663 A 20081008
  • EP 09002271 A 20090218

Abstract (en)

An audio encoder comprises a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch comprises a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and wherein the second encoding branch furthermore comprises a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder comprises a first domain decoder such as a spectral domain decoding branch, a second domain decoder such as an LPC domain decoding branch for decoding a signal such as an excitation signal in the second domain, and a third domain decoder such as an LPC-spectral decoder branch and two cascaded switches for switching between the decoders.

IPC 8 full level

G10L 19/14 (2006.01); G10L 19/008 (2013.01); G10L 19/16 (2013.01); G10L 19/18 (2013.01); G10L 19/00 (2013.01); G10L 19/02 (2013.01)

CPC (source: EP KR US)

G10L 19/008 (2013.01 - EP US); G10L 19/02 (2013.01 - KR); G10L 19/04 (2013.01 - KR); G10L 19/173 (2013.01 - EP US); G10L 19/18 (2013.01 - EP KR US); H03M 7/30 (2013.01 - KR); G10L 19/0017 (2013.01 - EP US); G10L 19/0212 (2013.01 - EP US); G10L 2019/0008 (2013.01 - EP US)

Citation (applicant)

ANDREAS SPANIAS: "Speech Coding: A Tutorial Review", PROCEEDINGS OF THE IEEE, vol. 82, no. 10, October 1994 (1994-10-01), pages 1541 - 1582

Citation (search report)

  • [A] WO 2008071353 A2 20080619 - FRAUNHOFER GES FORSCHUNG [DE], et al
  • [A] SEAN A RAMPRASHAD: "The Multimode Transform Predictive Coding Paradigm", IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 11, no. 2, 1 March 2003 (2003-03-01), XP011079700, ISSN: 1063-6676
  • [DA] TSG-SA WG4: "3GPP TS 26.290 version 2.0.0 Extended Adaptive Multi-Rate - Wideband codec; Transcoding functions (Release 6)", 3GPP DRAFT; SP-040639, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. TSG SA, no. Palm Springs, CA, USA; 20040913, 3 September 2004 (2004-09-03), XP050202966

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2144230 A1 20100113; AR 072421 A1 20100825; AU 2009267467 A1 20100114; AU 2009267467 B2 20120301; CA 2729878 A1 20100114; CA 2729878 C 20140916; CN 102113051 A 20110629; CN 102113051 B 20131023; EP 2301023 A1 20110330; EP 2301023 B1 20160323; ES 2569912 T3 20160513; HK 1156142 A1 20120601; IL 210331 A0 20110331; IL 210331 A 20140130; JP 2011527454 A 20111027; JP 5244972 B2 20130724; KR 101224559 B1 20130123; KR 20110036906 A 20110412; MX 2011000362 A 20110411; MY 153455 A 20150213; PT 2301023 T 20160711; RU 2010154747 A 20120710; RU 2485606 C2 20130620; TW 201011738 A 20100316; TW I539443 B 20160621; US 10319384 B2 20190611; US 10621996 B2 20200414; US 11475902 B2 20221018; US 11676611 B2 20230613; US 11682404 B2 20230620; US 11823690 B2 20231121; US 2011202354 A1 20110818; US 2011238425 A1 20110929; US 2013096930 A1 20130418; US 2015154967 A1 20150604; US 2019259393 A1 20190822; US 2020227054 A1 20200716; US 2023009374 A1 20230112; US 2023011775 A1 20230112; US 2023011987 A1 20230112; US 2023402045 A1 20231214; US 8447620 B2 20130521; US 8930198 B2 20150106; US 9043215 B2 20150526; WO 2010003564 A1 20100114; ZA 201009163 B 20110928

DOCDB simple family (application)

EP 09002271 A 20090218; AR P090102435 A 20090630; AU 2009267467 A 20090626; CA 2729878 A 20090626; CN 200980127091 A 20090626; EP 09793874 A 20090626; EP 2009004652 W 20090626; ES 09793874 T 20090626; HK 11110216 A 20110928; IL 21033110 A 20101229; JP 2011516996 A 20090626; KR 20117000728 A 20090626; MX 2011000362 A 20090626; MY PI20110013 A 20090626; PT 09793874 T 20090626; RU 2010154747 A 20090626; TW 98121861 A 20090629; US 201113004385 A 20110111; US 201113081223 A 20110406; US 201213707192 A 20121206; US 201414580179 A 20141222; US 201916398082 A 20190429; US 202016834601 A 20200330; US 202217933567 A 20220920; US 202217933583 A 20220920; US 202217933591 A 20220920; US 202318451067 A 20230816; ZA 201009163 A 20101221